Porous carbon fibers prepared from cellulose

A series of porous carbon microfibers has been prepared by controlled carbonization of cellulose precursors. Their surface area determined by the BET method from argon absorption ranges from about 1 to almost 1500 m.sup.2 g.sup.-1. The pore sizes of fibers determined with help of positron annihilati...

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Bibliographic Details
Published in:Journal of thermal analysis and calorimetry 2019-11, Vol.138 (3), p.1997-2004
Main Authors: Matko, Igor, Sausa, Ondrej, Cechová, Katarína, Novák, Ivan, Svajdlenková, Helena, Berek, Dusan, Pecz, Michal
Format: Article
Language:English
Subjects:
Argon
Calorimetry
Carbon fibers
Cellulose
Cellulose fibers
Differential scanning calorimetry
Microfibers
Positron annihilation
Sorption
Spectrum analysis
Surface area
Thermogravimetry
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Summary:A series of porous carbon microfibers has been prepared by controlled carbonization of cellulose precursors. Their surface area determined by the BET method from argon absorption ranges from about 1 to almost 1500 m.sup.2 g.sup.-1. The pore sizes of fibers determined with help of positron annihilation lifetime spectroscopy are in the range below 1 nm. Dried samples of the resulting material were imbued with water in order to characterize their water sorption abilities. Amount of absorbed water was precisely determined by thermogravimetry. Carbon fibers filled with water were analyzed with differential scanning calorimetry and positron annihilation lifetime spectroscopy. It has been shown that water sorption abilities of fibers are not simply proportional to their surface area; there exists a significant impact of other factors.
ISSN:1388-6150
1588-2926
DOI:10.1007/s10973-019-08696-6